Fastening inserting machine



Jan. 28, 1936. F. 1., MacKENZIE 2,028,840

FASTENING INSERTING MACHINE Filed March 7, 1935 Patented Jan. 28, 1936 UNITED STATES PATENT OFFICE Mass, by Eflie L. MacKenzie, administratrix,

Beverly, Mass., assignor to United Shoe Machinery Corporation, Paterson,

ration of New Jersey N. J., a corpo- Application March 7, 1935, Serial No. 9,845

8 Claims.

This invention relates to improvements in fastening forming and inserting machines and is illustrated herein as embodied in a machine particularly adapted to form and insert staples.

In some commercial types of staple forming and inserting machines staples are formed from lengths of wire having beveled ends, the cut ends of the legs of each staple being inclined in opposite directions. When a staple of this type is inserted in a work piece one leg of the staple is deflected in one direction and the other leg is deflected in the other direction. Such staples form efiective fastenings but under some conditions, for example, when staples are inserted close to the edge of a work piece, one of the staple legs may be deflected outwardly through the side of the work piece thus damaging the work and seriously impairing its appearance.

An object of the present invention is to provide an improved machine for forming and inserting staples by the use of which the above-mentioned difiiculties will be overcome. To this end the machine is provided with a staple forming mechanism which is arranged to shape the point of one leg of a staple after the staple has been formed. As illustrated, the inside former of the machine is provided with an abutment having an inclined surface. A staple having a short leg and a long leg is formed about the inside former, the legs of said staple having oppositely inclined ends. After the staple has been formed, the inside former is moved to bring the inclined surface of the abutment into engagement with the short leg of the staple to shape said leg in, a manner which will overcome its tendency to deflect when driven.

With the above and other objects and features in view the invention will now be described with reference to the accompanying drawing and pointed out in the claims.

In the drawing,

Fig. 1 is a view, in side elevation, partly in section, of a portion of a machine illustrating a preferred embodiment of the present invention;

Fig. 2 is a detail view, in section, on an enlarged scale of the staple forming mechanism of the machine;

Fig. 3 is a detail view, in section, of the yielding connection between the inside former and its operating cam; and

Fig. 4 is a view on an enlarged scale of a staple formed on the illustrated machine.

The present invention is illustrated as embodied in a machine of the type disclosed in United States Letters Patent No. 1.01.6.930.

' scribe herein.

The illustrated machine is provided with a head It] in which the operating instrumentalities of the machine are mounted. An operating shaft 12 is journale'd in suitable hearings in the head I 0. A cam I4 is secured to the shaft I2 and is provided with a closed cam track I6 which operates an inside former l8 through connections which will now be described. A cam roll 20 (shown in dotted lines in Fig. 1) connected to a horizontal slide 22 enters the cam track I6. The slide 22 is mounted on a rock shaft 24, one end of which is journaled in a bearing 26 formed in the head Ill. The other end of the shaft 24 is journaled in a bearing (not shown) at the front of the head It). The slide 22 is provided with a downwardly extending arm 28 which at its lower end is pivotally secured to a member 30. A bushing 32 is secured in the member 30 by a clamping screw 34. The bushing 30 is provided with internal screw threads at one end and receives a locking nut 36 which is arranged to bear against one end of a stiff spring 38. The other end of the spring bears against a washer 40 surrounding the reduced end of a rod 42. The washer 4B bears against a shoulder formed at the juncture of the reduced portion of the rod 32 and the tension of the spring 38 is adjusted by means of an adjusting nut 44 threaded to the reduced end of the rod 42. The adjusting nut 44 is locked to the reduced end of the rod 42 by a clamping screw 46. When it is necessary to adjust the tension of the spring 38, the clamping screw 46 is loosened and the adjusting nut 44 is turned until the desired tension is applied to the spring 38. The adjusting screw is then locked by tightening the clamping screw 46. The spring 38 forms a yieldable connection between the arm 28 and the rod 42 for purposes which will later be described.

The rod 42 is mounted for sliding movement in a suitable bearing formed in the head ID of the machine. The inside former I8 is secured to the forward end of the rod 42 by screws 48 and is provided with a projecting abutment member 50, as shown in Figs. 1 and 2. The forward end of the member 50 is provided with a surface 52 which is inclined toward the front of the machine. In Fig. 1, the inside former I8 is shown in the position which is occupies during the staple forming operation. It is to be noted that when the former I8 is in this position the V sequently,

spect to the center line of the short leg 58. After.

the point of the short leg 53 has been shaped as described above, the inside former" i8 is moved rearwardly by the action of the cam track it in the cam member l4 out of the path of movement of a driver it.

When a staple or other fastening having a beveled point is driven into a work pieceythe fastening is deflected in the direction of the bevel. The long leg 5% of the staple 54 is so located relatively to the edge of the work that the leg 5% is deflected away from the edge of the work but the short leg 58 is deflected slightly in the opposite direction toward the edge of the work. The leg 58 is relatively short and, conunder ordinary conditions, if not shaped as just described, the deflection would be slight but in some. cases where the staple is inserted close to the edge of the work the leg 58 might be deflected sufiiciently to penetrate through the edge of the work. This, however, will not occur if the leg of the staple is shaped by the mechanism of my invention.

The yieldable' connection, above referred to, which includes the spring" 38, is provided to pre= vent breakage of the connections between the inside former i8 and the cam track It; Thev tene sion of the spring 38 is so adjusted that the spring will yield if the former it meets an obstruction in the staple forming passage but is great enough to prevent yielding of the spring 38 when the point of the short leg, 58.0f the staple is being deflected,

The illustrated machine is provided with wire feeding and severing mechanism of the type disclosed in the Letters. Patent above referred to. After the inside former is has been moved into the position shown Fig. 1 and the wire has been fed and severed, an outsiderformer 62 is 'moved downwardly to the position shown in Fig. 1, to forma staple about the inside former I8. The outside former 52 is operated by connections toa cam track (not shown) in a cam member 6%. These connections include an arm 66 which is fixed to the forward end of the rock shaft 2 3, as disclosed in the above mentioned Letters Patent. The other end of the r'ockshaft 24 has fixed thereto an arm 68 which carries .a cam roll entering the cam track in the cam 54. After the staple Fi l has been formed the inside former i8 moves forwardly to engage the point of the short leg 58 with the inclined surface on the abutment member 5!) to deflect the pointas hereinbefore described. The inside former I8 is then returned to its initial position andthen a driver iii is moved downwardly by .a spring (not shown) to drive the finished staple 5:? through a driver passage in a stationary throat l2 and into a work piece mounted on a work support 15. The illustrated construction is particularly adapted for use in securing top lifts to heels in the manner disclosedand claimed in an application for United States Letters Patent Serial No. 3,950, filed January 29, 1935, in the name of John W. Courter. It is to be understood, however, that the illustrated machine is not limited in its utility to use in such work since it may ad= vantageously be used to secure together parts of other types of Work pieces.

Having thus described the invention, what is claimed as new and desired to secure by Letters Patent of the United States is:

1. In a staple forming and inserting machine, an inside former, an outside former arranged for movement to form a staple about said inside former, and means constructed and arranged to move said inside former into the path of movement of the outside former prior to the staple forming operation and also further to move the inside former to deflect the point of one of t .e staple legs after the staple has been formed.

2. In a staple forming and inserting machine, an insideformer, an outside former arranged for movement to form a staple about said inside former from a length of wire having beveled ends, and means constructed and arranged to move said inside formerrinto the path of movement of the outside former prior to the staple forrrLing operation and also further to move the inside former to deflect one of the beveled ends of the staple after the staple has been formed,

3. in a staple forming and inserting machine, an inside former having a projection thereon, an outside former arranged for movement to form a staple about said inside former, and means constructed and arranged to move said inside former into the path of movement of the outside former prior to the staple forming operation and further,

to move the inside former to cause the projection thereon to engage and shape the point of one of the staple legs after the staple has been formed.

4. In a staple forming and inserting machine, an inside formerhaving a projection thereon, an outside former arranged for movement to form a staple about said inside former from a length of wire having beveled ends, and means constructed and arranged to move said inside former into the path of movement of staple forming operations and also to move the projection on said inside former into engagement with one of the beveled ends of the staple to deflect said end after the staple has been formed. 5. In a staple forming and inserting machine, an inside former, an abutment on said inside former having an inclined surface, an outside former arranged for movement to form a staple about said inside former, and means constructed and arranged to move said inside former into the path of movement of the outside former prior to the staple forming operation andalso to move the the inclined surface'of said abutment against point of one of the staple legs toshape said leg after the staple has been formed.

In a staple forming and inserting machine, an inside former, an inclinedabutment carried by said inside former, an outside former arranged for movement to form about said inside former astaple having a short leg and a long leg, and

means for moving said inside former into the path of movement of said outside former prior to the staple forming operation and also to move 1 the inside former to cause the inclined abutment to engage the short leg of the staple to shape said leg after the staple has been formed,

7. In a staple forming and inserting machine, an inside former, an inclined abutment carried bysaid inside former, an outside former arranged for movement to form about said inside'former a staple having a short leg and a long leg, said legs having oppositely inclined ends, and means for moving the inside former into the path of movement of the outside former prior to the staple forming operation and also to move the 5 inclined abutment into engagement with the short leg of the staple to shape the point of said leg after the staple has been formed.

8. In a staple forming and inserting machine, an inside former, an abutment carried by said 10 inside former having an inclined surface, an a outside former arranged for movement to form about said inside former a staple having a short leg and a long leg, said legs having oppositely inclined ends, means for moving the inside former into the path of movement of the outside former prior to the staple forming operation and also to move the inclined surface of the abutment into engagement with the short leg of the staple to shape the point of said leg after the staple 5 has been formed, and a connection between said inside former and said means for moving the inside former arranged to yield when the inside former meets an excessive resistance in its movement toward staple forming position. 10

EFFIE L. MACKENZIE, Administmtria: of the Estate of Fred L. Mac- Kenzie, Deceased. 

